#!/usr/bin/python

if __name__=='__main__':
    import socket

    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.bind(('localhost', 7556))
    sock.listen(5)

    while True:
        connection, address = sock.accept()
        try:
            connection.settimeout(5)
            buf = connection.recv(1024)
            if buf == '1':
                connection.send('welcome to python server!')
            else:
                connection.send('please go out!')

        except socket.timeout:
            print 'time out'

    connection.close()
